Some teachers are so angry they are talking about a statewide walkout.

The proposed legislation, Indiana Senate Bill 575, would undercut teachers’ ability to negotiate new contracts. It would allow a school board to impose a contract on teachers, if teachers don’t accept the board’s last offer before a contract ends.

Teachers say that would set them back 40 years.

Indiana Teachers Federation president Rick Muir tells the Northwest Indiana Times it is illegal for teachers to go on strike in Indiana, and the union does not believe such action is appropriate. But with the frustration mounting, teachers are saying a walkout may happen, Muir told the newspaper.